this is ktvu channel 2 news at noon. >> charge at him with a rambo style knife. >> tense moments that led up to an officer-involved shooting in the east bay but first breaking news in the south bay. good afternoon, i am brian floor is, tori campbell is off. again three schools are on lock- down in sunnyvale after someone reported seeing a gan man with a gun in the area. he was seen running away there. they have locked down these schools. these are live pictures as you can see there. police are searching the area but have found no gunman. you see a police presence there again. 10 minutes ago sheriff's officials began escorting them on to school buses. they are telling parents to go there for information about the incident. we will stay on that during this noon newscast. also at this noon news hour alameda county sheriffs are investigating an officer- involved shooting there. noel walker has been there since this morning and joins us from dublin with the latest there. >> reporter: the sheriff's mobile unit arrived within the hour which means they man to stay here a while. you can see wh